Can't set SimulationRadius and MaximumSimulationsRadius?

So, basically I wanted to test around with SimulationRadius and MaximumSimulationsRadius. I read the dev wiki on what SimulationRadius and MaximumSimulationsRadius is and I tried to set the MaximumSimulationsRadius to 1e8, And tried to set the SimulationRadius to 5000. Didn't work, So I put it in StarterPlayer, Also didn't work. ServerScriptService? No. I have been using the developer wiki's example and I have no idea how to fix it. (I know very little about lua.) Edit: Not fixed.